Carbureter.



UNITE STATES PATENT OFFICE.

JULIUS H. MASON, OF DUNCAN FALLS, OHIO, ASSIGNOR OF ONE-FOURTH TO WILSON S. SPRAGUE, OF ZANESVILLE, OHIO, AND THREE-EIGHTHS TO SPENCER M. GARRETT, OF PHILO, OHIO.

CARBURETER.

Specification of Letters Patent.

Patented Dec. 19, 1905.

Application filed March 10, 1905. Serial No. 249,358.

To all whom it may concern:

Be it known that I, J ULIUs H. MAsoN, a citizen of the United States, residing at Duncan Falls, in the county of Muskingum and State of Ohio, have invented certain new and useful,

Improvements in Carbureters, of which the following is a specification.

This invention relates to a new and useful improvement in carbureters.

The object of the invention is to provide a device of the character described that will give a perfect mixture under all conditions and irrespective of the grade of fuel used.

Another feature resides in means which may be readily and expeditiously adjusted to vary the relations of the parts when the same becomes necessary or desirable.

Finally, the object of the invention is to provide a device of the character described that will be strong, durable, and eflicient, simple and comparatively inexpensive to make, and one in which the several parts will not be liable to get out of working order.

'With the above and other objects in view the invention consists of the novel details of construction and operation, a preferable embodiment of which is described in the specification, and illustrated in the accompanying drawings, wherein- Figure 1 is a vertical sectional view of my improved carbureter. Fig. 2 is a vertical section of the air-valve and its stem, 2. portion of the stem, together with the needle-valveoperating wedge, being in elevation. Fig. 3 is a horizontal sectional view on the line a w of Fig. 1 and also showing the lower portion of the casing in plan, and Fig. 1 is a horizontal sectional view taken on the line 3 y of Fig. 1.

In the drawings the numeral 1 designates the float-chamber, which is provided at its upper end with a screw-threaded cover 2, formed with the usual fuel-supply opening 3. An ordinary float 4 is mounted in the chamber 1 and supported on the usual valve-stem 5, the upper end of which is pointed to enter the fuel-suppl y opening 3 and operate in the usual manner. A passage 6 leads from the lower portion of the chamber vertically to a horizontal extension or continuation 7 formed in a boss 8, provided on the side of the chamber, which boss is reduced and elongated, so as to project through a collar 9, formed on the cashorizontal extension 7 terminates at the lower end of a vertical port 11 a short distance from the outer end of the reduced portion and within the collar 9. A horizontal port 12 extends from the vertical port 11 to the end of the reduced portion to establish communication with the interior of the said casing 10. The reduced portion of the boss 8 is bored centrally from its outer end, so as to receive the stem of a needle-point valve 13, the point of which enters and projects into the horizontal extension 7, so as to effectually close the same. The valve is formed with an enlarged central portion which is provided with a central elongated opening 14, through which passes a vertical valve-stem 15. On the opposite side of the valve from the stem 13 is formed an annular flange 16, disposed about a sleeve 17, which fits within an annular boss 18, projecting inside and outside of the casing 10. The inner portion of the boss 18 is reduced in diameter, so as to receive a coiled spring 19, which bears against the flange 16, tending to move the valve forward and force the needlepoint into the extension 7. The sleeve 17 is threaded to receive a screw 20, whose inner andsmooth end slightly projects into the elongated opening 14, as shown in Fig. 3.

The valve-stem 15 is formed with an irregular-shaped recess 21, in which is pivoted a wedge 22, having an angular face adapted to be engaged by the pointed end of an adjusting-screw 23. The wedge 22, being pivoted at its upper end and engaged with the screw 23 at its lower end, is caused to project beyond the surface of the valve-stem and incline downwardly and outwardly. The inner end of the screw 20, carried by the needle-valve, is adapted to be engaged by the inclined edge of the wedge when the valve-stem 15 moves upward. Owing to the inclined disposition of the said wedge as it is carried upward and engages with the screw 20, the needle-valve is moved backward against the tension of the spring 19 and the needlepoint withdrawn from the extension 7 thus allowing the fuel to pass into the vertical port 11 and to be drawn by the suction of the engine through the horizontal port 12 and sprayed into the casing 1. It is apparent that the greater the distance the wedge is caused to stand out from the valve stem the farther back the valve will be forced and the greater will be the quantity of fuel passing from the extension 7 into the vertical port 11. This outstanding of the wedge 22 may be readily controlled or adjusted by the screw 23, which being screwed upward forces the wedge outward and being screwed downward allows it to swing inward. Therefore should the grade of fuel be low and a greater amount required the screw 23 is turned so as to throw the wedge 22 outward, which will cause the valve to be drawn farther out. On the other hand, should the grade of fuel be high the screw 23 is turned to allow the wedge to swing inward, thus causing thevalve to be only partly drawn back and a. small amount of fuel admitted. After the screw 23 has been adjusted it will be held in position by a spring-pin 24, which bears against its milled head 25 and projects from the bottom of an intake or air valve 26. The valve 26 is connected to the stem 15 by bridge-walls 27, extending at right angles to each other and contacting at their outer end with the vertical cylindrical collar 28, formed in an annular chamber 29, provided on the lower end of the casing 10. Upon the upper and outer ends ofthe bridge-walls 27 is fixedly supported a ring 30, which with the said bridge-walls forms the valve 26, hereinbefore mentioned. The ring is of such height as to extend from the bottom of the casing almost to the upper end of the vertical collar 28 when the valve is in its lowermost position,

as shown in Fig. 1. The annular chamber 29 is formed at one side with the usual air-inlet 31. When the valve is in its lowermost position, as shown in Fig. 1, there will be a slight annular space between the upper edge of the collar 28 and the lower edge of the ring 30, thus allowing the air entering the chamber 29 to pass into the casing 10 and prevent the stopping of the engine when the same is throttled. The casing 10 at its upper portion is formed with an opening 32, through which the mixture passes to the engine. The upper end ofthe casing is closed except where the valve-stem passes snugly through the same and about which a vertical ring-like portion 33 is disposed on the casing. A coiled spring 34, encircling the valve-rod 15 within the ringlike portion 33, bears against the under side of a head 35, formed on the upper end of the said valve-stem.

A cap 36, provided at its lower end with a split portion 37, which surrounds the ringlike portion 34, is formed with an offset projection 37, which is slotted, so as to allow the short arm 38 of the bell-crank lever 39 to project into the cap and bear on the head 35, as shown in Fig. 1. The'bell-crank lever 39 is mounted upon a pivot-pin 40, supported in the projection 37. By means of the split portion 37 of the cap the cap may be turned upon the ring portion 33, thus allowing the short arm 38 is swung upward, and the spring 34, bearing against the head 35, being released, thus forces said valve-stem upward, raising and opening the air-valve 26 and caus ing the wedge 22 to engage with the screw 20 and open the needle-valve, as will be apparent. The suction created by the engine will draw the air into the casing and the fuel from the port 12, mixing the same, and finally drawing the mixture through the opening32. Asetscrew 41, passed through the bell-crank lever 39, isadapted to engage with a lug 42 and prevent the lever being swung back the full extent of its movement. This prevents the valve-stem 15 from being forced far enough down to entirely out off the supply of air. A spring-pin 43, set into the lever 39, engages with the head of the screw 41, thus acting to hold the said screw in position after it has been adjusted, in a similar manner to which the spring-pin 24 holds the head 25 of the screw 23, hereinbefore described.

It is obvious that by simply adjusting the screw 23 the proportions of fuel and air may be readily regulated and that it is not necessary to uncover or remove any of the parts of the carbureter to effect such changes in the proportions mentioned.

Having now fully described my invention, what I claim, and desire to secure by Letters Patent, is

1. In a carbureter, the combination with fuel-supply means, of a mixing-casing, a valve yieldably held to normally cut off the supply of fuel, an air-admitting valve having a stem adjacent the fuel-valve, and means carried upon the stem of the air-valve for moving the fuel-valve to admit fuel when the air-valve is moved, and means for adjusting the said lastnamed means to vary the relative movements of the valves.

2. In a carbureter, the combination with fuel-supply means, of a mixing-casing, a spring-pressed valve acting to cut off the supply of fuel to the casing, an air-admitting valve, a stem extending from the air-valve adjacent the fuel-valve, a movable wedge carried by the stem and adapted to move the fuelvalve against the tension of the spring when the stem is moved, means for moving the stem and the air-valve, and means for adjusting the wedge.

In testimony whereof I affix my signature in presence of two witnesses.

. JULIUS H. MASON. Witnesses:

M. J. MoOAIRD, S. S. WAXLER. 

